Electrical tester designed with digital LED display to accurately show DC voltage.Operating range of 5-90V DC to work on most vehicle electrical systems. And the LED ensures clear visibility during the day or in dimly lit areas,which is for engineers who pursue high-quality products. The circuit tester is a voltmeter tester with visual indicators.The alligator clamp can be connected to either positive or negative ground, with the probe touching the opposite side. If positive, the red light will illuminate. If negative, the green light comes on. Paired with an alligator clip for easy one handed operation. The electric fuse tester will come with a heat and oil resistant 140-inch PU spring wire,the user can perform an electrical test anywhere in, or around the vehicle, offering exceptional flexibility and durability. With sharp stainless steel probe for piercing wires, also for hard-to-reach tight areas.The probe is insulated to prevent the possibility of shorting the side of the probe to other components.The electrical tester body constructed with high-quality ABS, shatter-proof, more durable than normal electric test lights. The professional 5-90V LED voltage tester pen is perfect for checking automotive headlights, taillights, turn signal circuits, faulty sockets, fuse connections, broken wires, etc. It is suitable for boats, trailers, bulldozer, road roller, motorcycles and various circuits. Colour:As Shown Material:Metal+Plastic Package Contents: 1set * Automotive Test Light Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.